Question

a) (-6а2 + 4): (2а); б)(-7х3 + 14х2 – 21х): (-7х); в) (9а3с – 6а2с2): 3а2с2;

Answer 1

$a) \frac{ - 6a {}^{2} + 4}{2a} = \frac{ 2( - 3a + 2)}{2a} = \frac{ - 3a + 2}{a}$

$b)\frac{- 7{x}^{3} + 14 {x}^{2} - 21x}{ - 7x} = \frac{ - 7x( {x}^{2} - 2x + 3) }{ - 7x} = x {}^{2} - 2x + 3$

в)

$\frac{ {9a}^{3} c -6 {a}^{2} {c}^{2} }{3 {a}^{2} {c}^{2} } = \frac{3 {a}^{2} {c}^{} (3 a - 2c)}{3a {}^{2} c {}^{2} } = \frac{3a - 2c}{c}$